Find the sum of first n terms of the series ` 1^(3) + 3^(3) + 5^(3) +…`

Explanation

To find the sum of the first n terms of the series \( 1^3 + 3^3 + 5^3 + \ldots \), we can follow these steps:

### Step 1: Identify the nth term of the series
The series consists of the cubes of the first n odd numbers. The nth odd number can be expressed as:
\[ a_n = 2n - 1 \]
Thus, the nth term of the series is:
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